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Evolution of mitotic cell-lineages in multicellular organisms
T Fagerström1, D A Briscoe, P Sunnucks
1Dept of Theoretical Ecology, Ecology Building, S-223 62 Lund, Sweden.
Trends in Ecology & Evolution
|January 18, 2011
Summary
Asexual reproduction via mitotic lineages contributes to adaptive evolution in multicellular organisms, challenging traditional views focused solely on sexual reproduction and genetic inheritance.
Area of Science:
- Evolutionary biology
- Genetics
- Developmental biology
Background:
- Multicellular organism evolution traditionally emphasizes sexual reproduction and genetic inheritance.
- Asexual reproduction, common in eukaryotes, involves mitotic cell lineage proliferation.
- The Weismannian concept of individuality limits evolutionary consideration of asexual lineages.
Purpose of the Study:
- To re-evaluate the role of asexual reproduction in adaptive evolution.
- To integrate asexual lineage adaptation into contemporary evolutionary theory.
- To challenge the exclusive focus on the germline in evolutionary processes.
Main Methods:
- Review of existing evidence on asexual reproduction in animals and plants.
- Theoretical analysis of evolutionary mechanisms in mitotic lineages.
- Reconciliation of asexual adaptation with established evolutionary principles.
Main Results:
- Asexual reproduction through mitotic lineages is a significant contributor to adaptive changes.
- Evidence from diverse eukaryotic phyla supports the adaptive potential of asexual lineages.
- Abandoning the Weismannian concept of individuality is necessary to fully understand these adaptations.
Conclusions:
- Asexual reproduction plays a crucial role in the adaptive evolution of multicellular organisms.
- Evolutionary theory must encompass adaptations arising from mitotic cell lineages.
- Rethinking individuality is key to understanding the full spectrum of evolutionary mechanisms.
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